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7/8-9 x 3 Cup Point Square Head Set Screw gives maintenance crews a wrench-driven cup point fastener for machinery that still calls out square-head hardware. The cup point creates localized contact with the mating surface, while the external flats give the installer a direct wrenching surface.

Conveyor drive pulleys and shaft-mounted components can use this pattern when a protruding drive head is acceptable.

For older machinery and uncommon set screw callouts, Cold Headers helps match the requested diameter, length, head style, and point configuration. Review the thread, length, square-head dimensions, and cup point diameter before substituting another set screw style.

Technical Highlights

  • Head: Square, wrench-driven; flats match nominal size
  • Point: Cup Point
  • Thread Size: 7/8-9 (Class 2A)
  • Length: 3 in.
  • Width Across Flats: 0.875 max / 0.852 min in.
  • Width Across Corners: 1.237 max / 1.170 min in.
  • Head Height: 0.678 max / 0.635 min in.
  • Cup Point Diameter: 0.530 max / 0.502 min in.
  • Material: Carbon Steel, case hardened per ASME B18.6.2 (case hardness 83 HR15 minimum, case depth 0.006 in. minimum)
  • Finish: Plain
  • Dimensional Standard: ASME B18.6.2

Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.

Unit of Measure

Specifications

Brands

 N/A Cold Headers, Inc.

Diameter

 N/A 7/8-9

Length

 N/A 3 in

Material

 N/A Carbon Steel

Shape

 N/A Square

Quantity

 N/A 10

Package Type

 N/A Box

Search

 N/A CPSHSS.7/8-9.3

Note

Note

 N/A Less Than Package Quantity Specified Plus 25%.

1 1/8" Diameter and Larger also Stocked Prices on Application.